tools: Add PpcMemDevice as an HostIoInterface
PPC platforms may require a different mempath and different I/O
operations to access the file system.
Change-Id: I46b8825c685b362009dc62fdbaa59c65239831d1
Signed-off-by: Brandon Kim <brandonkim@google.com>
diff --git a/tools/io.cpp b/tools/io.cpp
index 21e7d40..991507b 100644
--- a/tools/io.cpp
+++ b/tools/io.cpp
@@ -91,4 +91,61 @@
return true;
}
+PpcMemDevice::~PpcMemDevice()
+{
+ // Attempt to close in case reads or writes didn't close themselves
+ if (ppcMemFd >= 0)
+ {
+ sys->close(ppcMemFd);
+ }
+}
+
+bool PpcMemDevice::read(const std::size_t offset, const std::size_t length,
+ void* const destination)
+{
+ ppcMemFd = sys->open(ppcMemPath.c_str(), O_RDWR);
+ if (ppcMemFd < 0)
+ {
+ std::fprintf(stderr, "Failed to open PPC LPC access path: %s",
+ ppcMemPath.c_str());
+ return false;
+ }
+
+ int ret = sys->pread(ppcMemFd, destination, length, offset);
+ if (ret < 0)
+ {
+ std::fprintf(stderr, "IO read failed at offset: 0x%zx, length: %zu\n",
+ offset, length);
+ sys->close(ppcMemFd);
+ return false;
+ }
+
+ sys->close(ppcMemFd);
+ return true;
+}
+
+bool PpcMemDevice::write(const std::size_t offset, const std::size_t length,
+ const void* const source)
+{
+ ppcMemFd = sys->open(ppcMemPath.c_str(), O_RDWR);
+ if (ppcMemFd < 0)
+ {
+ std::fprintf(stderr, "Failed to open PPC LPC access path: %s",
+ ppcMemPath.c_str());
+ return false;
+ }
+
+ ssize_t ret = sys->pwrite(ppcMemFd, source, length, offset);
+ if (ret < 0)
+ {
+ std::fprintf(stderr, "IO write failed at offset: 0x%zx, length: %zu\n",
+ offset, length);
+ sys->close(ppcMemFd);
+ return false;
+ }
+
+ sys->close(ppcMemFd);
+ return true;
+}
+
} // namespace host_tool
diff --git a/tools/io.hpp b/tools/io.hpp
index 44cd2cb..6cc982c 100644
--- a/tools/io.hpp
+++ b/tools/io.hpp
@@ -68,4 +68,34 @@
const internal::Sys* sys;
};
+class PpcMemDevice : public HostIoInterface
+{
+ public:
+ explicit PpcMemDevice(const std::string ppcMemPath,
+ const internal::Sys* sys = &internal::sys_impl) :
+ ppcMemPath(ppcMemPath),
+ sys(sys)
+ {
+ }
+
+ ~PpcMemDevice() override;
+
+ /* Don't allow copying or assignment, only moving. */
+ PpcMemDevice(const PpcMemDevice&) = delete;
+ PpcMemDevice& operator=(const PpcMemDevice&) = delete;
+ PpcMemDevice(PpcMemDevice&&) = default;
+ PpcMemDevice& operator=(PpcMemDevice&&) = default;
+
+ bool read(const std::size_t offset, const std::size_t length,
+ void* const destination) override;
+
+ bool write(const std::size_t offset, const std::size_t length,
+ const void* const source) override;
+
+ private:
+ int ppcMemFd = -1;
+ const std::string ppcMemPath;
+ const internal::Sys* sys;
+};
+
} // namespace host_tool